What is the best way to merge two objects during runtime using C#?

Question

I have two objects and I want to merge them:

public class Foo
{
    public string Name { get; set; }
}

public class Bar
{
    public Guid Id { get; set; }
    p         


        

Answer 1

UNTESTED, but using the Reflection.Emit API, something like this should work:

public Type MergeTypes(params Type[] types)
{
    AppDomain domain = AppDomain.CurrentDomain;
    AssemblyBuilder builder = 
        domain.DefineDynamicAssembly(new AssemblyName("CombinedAssembly"),
        AssemblyBuilderAccess.RunAndSave);
    ModuleBuilder moduleBuilder = builder.DefineDynamicModule("DynamicModule");
    TypeBuilder typeBuilder = moduleBuilder.DefineType("CombinedType");
    foreach (var type in types)
    {
        var props = GetProperties(type);
        foreach (var prop in props)
        {
            typeBuilder.DefineField(prop.Key, prop.Value, FieldAttributes.Public);
        }
    }

    return typeBuilder.CreateType();


}

private Dictionary GetProperties(Type type)
{
    return type.GetProperties().ToDictionary(p => p.Name, p => p.PropertyType);
}

USAGE:

Type combinedType = MergeTypes(typeof(Foo), typeof(Bar));